元类学习遇见的小问题

[yellowtail]

class Meta(type):
def __new__(self,class_name,bases,attrs):
print(attrs)
return type(class_name,bases,attrs)

Meta('dog',(),{'x':5})

输出：{'x': 5}


class Meta(type):
def __new__(self,class_name,bases,attrs):
print(attrs)
return type(class_name,bases,attrs)

class Dog(metaclass = Meta):
x = 5
输出：{'__module__': '__main__', '__qualname__': 'Dog', 'x': 5}

请问两者是类似 class name:和 type(name,(),{})的这种等价吗...

[NKID00]

class name: 和 type(name, (), {}) 在某些特殊情况下不一定等价
https://gist.github.com/NKID00/51021e03c8f979df5bf4cb5adca64cc7